SOLUTION: If repetitions are not permitted, (i) how many 3 digit numbers can be formed from the six
digits 2, 3, 5, 6, 7 and 9? (ii) How many of these are less than 400? (iii) How many are
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Question 367511: If repetitions are not permitted, (i) how many 3 digit numbers can be formed from the six
digits 2, 3, 5, 6, 7 and 9? (ii) How many of these are less than 400? (iii) How many are
even? (iv) How many are odd? (v) How many are multiples of 5?
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
nPr=n!/(n-r)!
.
i) 6!/(6-3)!=6*5*4=120
.
2) 2/6 * 120 = 40
.
3) 2/6 * 120 = 40
.
4) 1/6 * 120 = 20
.
Ed
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